Heating, Air Conditioning, Fridge, HVAC/RUUD Achiever Super Queit 80


QUESTION: When I turn on my thermostat a motor comes on for no more than 60 seconds but the furnace never lights.  There are 3 lights the power one stays on the middle one blinks twice and the flame light never comes on.  I am not sure were to go from here.  I have checked my ducts and they are all clear of debris.  Please help.

ANSWER: Jason,

See if you can find the codes for the blinking lights, it may be located behind the blower door.You may have tripped a high limit control. look at wiring diagram to locate your limits, some are resettable. Try bypassing the t-stat, by jumping R to W at the furnace low voltage terminal board, ( where the wires from the t-stat hook to ) make sure your blower door is in place as there usually is a door switch. Unit will not run if blower door panel is removed. What motor are you talking about ,the inducer motor ,or the blower motor. If this is a propane unit ,try turning power off to the furnace then turn back on.

Found on web, for a RUUD furnace, do not know if this would be for your model.

Error Codes
A green LED indicates system faults
Steady On: System OK
Steady OFF: Board control fault or no power applied
1 Flash: Ignition failure (control in one-hour lockout)
2 Flashes: Pressure switch fault, fails open (switch is
stuck open)
3 Flashes: Limit switch open (main or auxiliary)
4 Flashes: Pressure switch fault, fails closed (switch is
stuck closed)
A yellow LED indicates flame status
Steady on: Normal flame is sensed
Flashes: As flame weakens, frequency of LED flashes

Pressure switch closes once the draft motor reaches full speed, then your pilot should light ( providing all your safty limit controls are closed )

---------- FOLLOW-UP ----------

QUESTION: Where is the pressure switch located I have looked at the wiring diagram several times and it show nothing about a pressure switch location


Did you confirm from your ledger ,that indeed the two blinking lights says pressure switch first?? If so your pressure switch is mounted on the ventor motor/draft motor/ purge motor, people call them different names. You would need to ohm it out to make sure it closes when the ventor motor reaches full speed.Google your model number or a generic RUUD Achiever 80 series pressure switches to show location , should have two wires on it. You would need to physically remove both wires and tape bare ends then ohm out.Should be open when ventor is not running and closes when motor is at full speed  

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40+ years diversified experience.An HVAC/Refrigeration Self Employed Contractor since 1986. NATE Certifield. Answer questions pertaining to Residential and Commercial Air Conditioning , Warm Air Heating, Heat Pump systems.Mechanical and Electrical troubleshooting of these systems.Be as detailed as possible when describing problem.Packaged unit or split systems.No appliance questions.


Installation and Troubleshooting, Mechanical and Electrical, in following areas, Refrigeration ( Walk In and Reach In Coolers and Freezers ) Commercial Roof Top and Packaged Heating/Cooling ( Natural Gas,Propane, Electric, and Heat Pumps ) Computer Room Air Conditoning Systems,Commercial Residential Packaged and Split Systems Air Conditoning and Heat Pumps.Warm Air Oil , Natural and Propane Gas Heating systems.

Graduated from Private Technical School in 1975. An HVAC/Refrigeration Contractor . Have Unlimited Heating/Piping and Cooling Contractor License.Limited Sheetmetal Contractors License.NATE Certifield. York Certifield Master Heat Pump Technician 1986. Served 33 years combination Active Duty Air Force , Air Force Reserves and Air National Guard in the HVAC/Refrigeration Shop/Mechanical Shop. Troubleshooting/Installing HVAC/Refrigeration Equiptment Worldwide. Retiring in 2003 as a Senior NCO ,and a Mechanical Superintendent.

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